ci: flutter CI now compares produced images against references

Automatically creates PR to store them

.github/workflows/build.yml

@@ -11,6 +11,7 @@ on:
       - src/flutter/**
       - tests/flutter/**
       - examples/flutter/**
+      - tests/reference-images/**
 
     branches:
       - main

.github/workflows/flutter-dev.yml

@@ -40,6 +40,7 @@ jobs:
         uses: actions/checkout@v4
         with:
           submodules: true
+          token: ${{ secrets.PAT_KDDW_REFERENCE_SCREENSHOTS }}
 
       - name: Install dependencies on Ubuntu
         run: |
@@ -66,9 +67,36 @@ jobs:
         run: |
           cd ${{ github.workspace }}/src/flutter/dart
           flutter pub get
-          cd ${{ github.workspace }}/tests/flutter/
+          flutter test
+        env:
+          KDDW_BINDINGS_LIB: ${{ github.workspace }}/build-dev-flutter/lib/libkddockwidgets.so
+
+      - name: Setup git author name
+        run: |
+          git config --global user.email "kddw@actions"
+          git config --global user.name "KDDW Actions"
+
+      # the reference is always latest main, as submodule sha1 might be lagging
+      # as it's updated nightly
+      - name: checkout latest main of ref images
+        run: |
+          cd tests/reference-images
+          git checkout main
+
+      - name: Run integration tests
+        run: |
+          cd tests/flutter/
           flutter pub get
-          cd ${{ github.workspace }}/build-dev-flutter/
-          ctest --output-on-failure
+          xvfb-run flutter test -d linux integration_test/ui_test.dart
         env:
           KDDW_BINDINGS_LIB: ${{ github.workspace }}/build-dev-flutter/lib/libkddockwidgets.so
+
+      - name: Compare against reference images
+        shell: bash
+        if: github.event_name == 'pull_request'
+        run: |
+          ./compare_images.sh
+        env:
+          PAT: ${{ secrets.PAT_KDDW_REFERENCE_SCREENSHOTS }}
+          GITHUB_EVENT_PATH: ${{ github.event_path }}
+          GH_TOKEN: ${{ github.token }}

.github/workflows/valgrind-leakcheck.yml

@@ -6,12 +6,16 @@ name: Valgrind qtwidgets_leak_test
 
 on:
   push:
+    paths-ignore:
+      # These are built by another workflow
+      - src/flutter/**
+      - tests/flutter/**
+      - examples/flutter/**
+      - tests/reference-images/**
     branches:
-      - 2.1
       - main
   pull_request:
     branches:
-      - 2.1
       - main
 
 jobs: